CN110601350A - High-voltage self-adaptive area spare power automatic switching system and spare power automatic switching control method thereof - Google Patents
High-voltage self-adaptive area spare power automatic switching system and spare power automatic switching control method thereof Download PDFInfo
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- CN110601350A CN110601350A CN201910901423.3A CN201910901423A CN110601350A CN 110601350 A CN110601350 A CN 110601350A CN 201910901423 A CN201910901423 A CN 201910901423A CN 110601350 A CN110601350 A CN 110601350A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The electromagnetic ring network of 500kV and 220kV systems operates, the short-circuit current level of the whole system is increased, the thermal stability limit is reduced, and the 220kV power grid open-loop operation mode is very necessary. After the ring is opened, the regional spare power automatic switching is adopted to be an effective mode for ensuring the reliability of power supply. The invention provides a self-adaptive regional spare power automatic switching device which comprises a transformer substation A, a transformer substation B, a regional spare power automatic switching logic judgment device, an acquisition execution unit and a main wiring of a power supply system.
Description
Technical Field
The invention belongs to the technical field of electric power, particularly relates to a high-voltage self-adaptive regional automatic backup power switching system and a control method thereof, and particularly relates to an in-station local automatic backup power switching function when two groups of double circuit lines of a double-bus main wiring are connected and a regional automatic backup power switching system between two stations.
Background
With the mass production of power supply projects and power transmission and transformation projects, the 500kV/220kV power grid structure is continuously strengthened, the influence of the operation of an electromagnetic ring network and the increase of the short-circuit current level of a 220kV power grid are increasingly highlighted, and therefore the 220kV power grid needs to be operated in an open loop mode. After the loop is opened, in order to improve the reliability of power supply, it is very important to select a proper spare power automatic switching device.
The existing backup automatic switching device is usually only suitable for the wiring condition of a single transformer substation, and a 220kV transformer substation operated in an open loop mode needs to flexibly select a loop breaking point among 2 transformer substations at least. And the transformer substation circuit involves tie line, power cord, and the operation mode is nimble changeable, uses conventional spare power automatic switching device, can't satisfy the requirement.
Disclosure of Invention
220kV high voltage electric network is regional loop configuration, and generally the ring opening point selects arbitrary inlet wire circuit breaker of two transformer substations, and tie line circuit breaker or same transformer substation segmentation (female tie) circuit breaker according to the wiring characteristics, and the ring opening point is selected at the total multiple operation mode of inlet wire circuit breaker and tie circuit breaker, as shown in fig. 1:
in the operation mode 1, DL12 is in hot standby, other 5 breakers are closed, the incoming line DL11 loses power, the voltage of the substation A is lost, the standby power automatic switching operation jumps out of the incoming line DL11, the incoming line DL12 is closed, and the power supply of the substation A is recovered.
In the operation mode 2, the incoming line DL11 is in hot standby, other 5 breakers are closed, and the DL12 loses power, so that the voltage of the substation A is lost, the standby power automatic switching action trips off the DL12, the incoming line DL11 is closed, and the power supply of the substation A is recovered.
In the operation mode 3, DL22 is in hot standby, other 5 breakers are closed, the incoming line DL11 loses power, the voltage of the substation A is lost, the standby power automatic switching operation jumps out of the incoming line DL11, the incoming line DL22 is closed, and the power supply of the substation A is recovered.
The wiring mode is a wiring mode commonly used by a 110kV transformer substation of a power grid, the 110kV transformer substation has other connection modes, the 220kV transformer substation is mainly double-bus wiring, and the incoming line is not more than two return lines. Most of the existing automatic backup power switching equipment is designed for carrying out automatic backup power switching logic judgment according to different wiring modes of specific substations, and the invention provides a high-voltage self-adaptive regional automatic backup power switching system by analyzing main wirings in various forms, which can meet various main wiring modes on site and is automatically adaptive without manual operation.
In order to achieve the purpose, the invention provides the following technical scheme:
the high-voltage self-adaptive regional automatic bus transfer system comprises a transformer substation A, a transformer substation B, a regional automatic bus transfer device and a main wiring of a power supply system.
The regional automatic bus transfer device comprises a regional automatic bus transfer logic judgment device and an acquisition execution unit;
the acquisition execution unit acquires analog quantity information such as voltage and current of a transformer substation and switching quantity information such as switch positions and the like, and simultaneously receives and executes a spare power automatic switching tripping and closing command issued by the regional spare power automatic switching logic judgment device;
the regional spare power automatic switching logic judgment device receives the acquisition information of the acquisition execution unit and carries out logic judgment of a regional spare power automatic switching strategy, and the logic judgment basis is that line voltage and bus voltage connected with the circuit breaker are simultaneously subjected to voltage loss judgment to be voltage applied.
The main wiring of the power supply system adopts a self-adaptive area spare power automatic switching model.
As shown in fig. 3a), DL11 and DL12 may operate in the I mother or in the II mother, and the supply/standby of power supplies 1 and 2 cannot be determined by the I mother TV and the II mother TV, so that the adaptive logic determination cannot be performed. The invention regards the breaker DL and the bus (I bus or II bus) as a whole, and determines whether the power supply connected with the bus is changed from normal power supply to no voltage by judging whether the switched voltage is present or not, as shown in fig. 3b, namely whether the line voltage connected with the breaker and the bus voltage are simultaneously in voltage loss or not.
The circuit breaker and the bus are bound to form a power supply, the circuit breaker and the bus on a certain section of bus are regarded as a whole, line voltage is added to serve as one of criteria during judgment, and the fact that the bus voltage and the line voltage lose voltage at the same time can indicate that the power supply loses voltage. By adopting the mode, the self-adaption of various wiring conditions can be realized.
Further, the area acquisition execution unit comprises a mutual inductor, A/D, DSP; the mutual inductor comprises a conventional mutual inductor and an electronic mutual inductor, wherein the conventional mutual inductor is connected with the DSP through the A/D, and the electronic mutual inductor is directly connected with the DSP.
Furthermore, the self-adaptive area spare power automatic switching model adopts a double-bus wiring mode, and each power supply or each line is connected to two groups of buses through a circuit breaker and two groups of isolating switches.
Further, the self-adaptive area spare power automatic switching model is provided with two power supplies, namely a main power supply and a spare power supply. The invention mainly aims at regional spare power automatic switching of two transformer substation stations, and therefore the invention comprises two power supplies, wherein one power supply is a main power supply and the other power supply is a spare power supply, the main power supply loses power, the main power supply is switched off, and the spare power supply is switched on.
Further, each circuit breaker all sets up the maintenance clamp plate.
The method aims to solve the problem that multiple incoming lines exist in a transformer substation, the spare power automatic switching is only the spare power automatic switching of two power supplies, and through the input of a maintenance pressing plate, a non-power supply circuit does not participate in the spare power automatic switching logic judgment, so that the rapid logic judgment of the regional spare power automatic switching is realized.
Furthermore, the transformer substation is respectively provided with the regional spare power automatic switching devices, so that the conventional spare power automatic switching function in the substation can be realized, and the function that two substations are mutually spare can also be realized.
Furthermore, the regional automatic backup power switching device comprises a light emitting unit and a light receiving unit, and the two regional automatic backup power switching devices are directly connected through optical fibers to exchange information.
The invention also provides a spare power automatic switching control method of the high-voltage self-adaptive regional spare power automatic switching system, which comprises the following steps:
step 1: the regional automatic bus transfer logic judgment device acquires state information through an acquisition execution unit in a transformer substation;
step 2: completing the charging preparation;
and step 3: the regional automatic bus transfer logic judgment device is used for judging the voltage state, the line voltage and the line current state of the integral power supply of the transformer substation and the position state of each line switch in a comprehensive mode and starting the action logic of regional automatic bus transfer;
and 4, step 4: and the acquisition execution unit executes a command according to the action logic result of the regional automatic bus transfer logic judgment device.
Further, the status information includes, but is not limited to: and the voltage state, the line voltage, the line current state and the position state of each line switch of the whole power supply in the self-adaptive regional spare power automatic switching model. And then, the voltage after switching is adopted to judge whether the current power supply of the station is a power supply, whether the current power supply is an incomplete transformer station or an incomplete transformer station, and then different action logics are implemented:
for a non-fully-closed transformer substation, the action logic of the regional spare power automatic switching device is in a charging completion state; if the discharging condition is not met, starting remote switching-on standby logic starting, and when a switching-on signal sent by a full switching-on station starting backup power automatic switching signal is received, executing a command by an acquisition execution unit and finishing the action logic of regional backup power automatic switching; judging whether the discharging condition is met or not again when the command of the closing signal is not received; and finishing the action logic of the regional backup power automatic switching when the discharging condition is met.
For a fully-closed transformer substation, the action logic of the regional backup power automatic switching is that the action logic of the regional backup power automatic switching is in a charging completion state; if the discharging condition is not met, starting a non-voltage tripping logic, locking the spare power automatic switching device, and sending a locking contact to a non-fully closed station; when the non-voltage tripping logic fails, tripping and starting the non-fully closed station spare power automatic switching; and if the discharging condition is met, ending the action logic of the regional backup power automatic switching.
The circuit breaker and the bus are regarded as a whole, the power supply condition of the power supply is judged by adopting the existence of the switched voltage, and the position state of each circuit switch is further judged so as to realize the high-voltage self-adaptive area spare power automatic switching logic of different wiring modes; aiming at the condition of multiple incoming lines, the maintenance pressing plate is put into the circuit of the circuit breaker, so that the non-power supply circuit does not participate in the logic judgment of the spare power automatic switching, and the rapid logic judgment of the regional spare power automatic switching is realized. The self-adaptive regional spare power automatic switching device provided by the invention conforms to the basic principle of spare power automatic switching, and has high self-adaptive degree and complete functions. The whole set of tests and the current operation conditions prove that the device can adapt to various operation modes of various main wiring and has better engineering application value.
Drawings
FIG. 1 is a schematic diagram of a prior art wiring operation;
FIG. 2 is a schematic diagram of an adaptive regional backup power automatic switching model according to the present invention;
FIG. 3 is a schematic diagram of the dual bus connection voltage switching of the present invention;
FIG. 4 is a schematic diagram of the high-voltage adaptive regional backup power automatic switching system according to the present invention;
fig. 5 is a schematic diagram of a regional backup power automatic switching communication mode in which two substations stand by with each other;
FIG. 6 is a flow chart of the backup power automatic switching operation of the non-integrated substation;
FIG. 7 is a flow chart of the backup power automatic switching operation of the integrated substation;
fig. 8 is a schematic diagram of an adaptive area backup automatic switching model according to embodiment 2 of the present invention;
fig. 9 is a schematic diagram of an adaptive area spare power automatic switching model according to embodiment 3 of the present invention;
fig. 10 is a schematic diagram of an adaptive area backup automatic switching model according to embodiment 4 of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The schematic diagram of the high-voltage self-adaptive regional automatic bus transfer system and the communication mode of the regional automatic bus transfer with the two transformer substations in mutual standby are shown in fig. 4 and 5.
A high-voltage self-adaptive regional automatic bus transfer system comprises a transformer substation A, a transformer substation B, a regional automatic bus transfer device and a main wiring of a power supply system:
the regional automatic bus transfer device comprises a regional automatic bus transfer logic judgment device and an acquisition execution unit;
the acquisition execution unit acquires analog quantity information such as voltage and current of a transformer substation and switching quantity information such as switch positions and the like, and simultaneously receives and executes a spare power automatic switching tripping and closing command issued by the regional spare power automatic switching logic judgment device;
the regional spare power automatic switching logic judgment device receives the acquisition information of the acquisition execution unit and performs logic judgment on a regional spare power automatic switching strategy;
the main wiring of the power supply system adopts a self-adaptive area spare power automatic switching model.
The schematic diagram of the self-adaptive area spare power automatic switching model is shown in figure 2: TVLA1, TVLA2, TVMA1, TVMA2, TVMB1, TVMB2, TVLB1 and TVLB2 are secondary voltages of the bus TV after switching, are independent of the position of a breaker and are only related to the position of a disconnecting switch; TVLa1, TVLa2, TVMa1, TVMa2, TVMb1, TVMb2, TVLb1, TVLb2 are line voltages. The combination of the switched voltage and the line voltage is used as a criterion for judging whether the power supply is in voltage loss or not, the voltage and the line voltage after switching are used for judging the power supply voltage loss, and the voltage and the line voltage after switching are used for judging the power supply voltage.
For the voltage after the double-bus wiring voltage is switched is only related to the position of a disconnecting link and is not related to the position of a breaker, see fig. 3, when a circuit is connected to a bus I, a normally open auxiliary contact of the disconnecting link of the bus I is closed, a normally closed auxiliary contact of the bus II is closed, secondary voltage is accessed by a bus TV, and the circuit and the bus I are bound to form a power supply. When the circuit is connected to the second bus, the normally open auxiliary contact of the disconnecting link of the second bus is closed, the normally closed auxiliary contact of the first bus is closed, the secondary voltage is accessed by the TV of the second bus, and the circuit and the second bus are 'bundled' to be used as a power supply. From the above analysis, it can be seen that the switched voltage for realizing the link between the line and the bus is only related to the position of the disconnecting link and is not related to the position of the circuit breaker.
Preferably, the adaptive area spare power automatic switching model is provided with two power supplies, namely a main power supply and a spare power supply. The invention mainly aims at regional spare power automatic switching of two transformer substation stations, and therefore the invention comprises two power supplies, wherein one power supply is a main power supply and the other power supply is a spare power supply, the main power supply loses power, the main power supply is switched off, and the spare power supply is switched on.
Preferably, the self-adaptive regional backup power automatic switching model adopts a double-bus wiring mode, as shown in fig. 2, and each power supply or each line is connected to two groups of buses through a breaker and two groups of isolating switches. By adopting the mode, the self-adaption of various wiring conditions can be realized.
The breaker and the bus are bound to form a power supply, the power supply breaker and the bus on a certain section of bus are regarded as a whole, and the bus voltage loss represents the power supply voltage loss. It should be noted that, during the judgment, the line voltage is also added as one of the criteria, and the simultaneous loss of the bus voltage and the line voltage indicates the loss of the power supply voltage.
Preferably, the circuit breaker and the bus form an integral power supply, and each circuit breaker is provided with an overhaul pressing plate. The method aims to solve the problem that a transformer substation can be accessed by a plurality of power supplies, the spare power automatic switching is only spare power automatic switching of two power supplies, and the rest power supplies do not participate in the logic judgment of the spare power automatic switching through the switching of the maintenance pressing plate.
The transformer substation is respectively provided with the regional automatic bus transfer equipment, so that the conventional automatic bus transfer function in the substation can be realized, and the function of mutual standby between two substations can also be realized.
Preferably, the regional automatic backup power switching device includes a light emitting unit and a light receiving unit, and the two regional automatic backup power switching devices are directly connected through an optical fiber for information exchange, as shown in fig. 5.
The invention also provides a spare power automatic switching control method of the high-voltage self-adaptive regional spare power automatic switching system, which comprises the following steps:
step 1: the regional automatic bus transfer logic judgment device acquires state information through an acquisition execution unit in a transformer substation; the status information includes, but is not limited to: the voltage state, the line voltage, the line current state and the position state of each line switch of the whole power supply in the self-adaptive regional spare power automatic switching model;
step 2: completing the charging preparation;
and step 3: the regional automatic bus transfer logic judgment device is used for judging the voltage state, the line voltage and the line current state of the integral power supply of the transformer substation and the position state of each line switch in a comprehensive mode and starting the action logic of regional automatic bus transfer;
and 4, step 4: and the acquisition execution unit executes a command according to the action logic result of the regional automatic bus transfer logic judgment device.
For the action logic of the regional backup power automatic switching of the non-fully-closed substation, see fig. 6, the action logic of the regional backup power automatic switching is in a charging completion state; if the discharging condition is not met, starting remote switching-on standby logic starting, and when a switching-on signal sent by a full switching-on station starting backup power automatic switching signal is received, executing a command by an acquisition execution unit and finishing the action logic of regional backup power automatic switching; judging whether the discharging condition is met or not again when the command of the closing signal is not received; and finishing the action logic of the regional backup power automatic switching when the discharging condition is met.
For the action logic of the regional backup power automatic switching of the fully-closed substation, see fig. 7, the action logic of the regional backup power automatic switching is that the action logic of the regional backup power automatic switching is in a charging completion state; if the discharging condition is not met, starting a non-voltage tripping logic, locking the spare power automatic switching device, and sending a locking contact to a non-fully closed station; when the non-voltage tripping logic fails, tripping and starting the non-fully closed station spare power automatic switching; and if the discharging condition is met, ending the action logic of the regional backup power automatic switching.
Example 2
The dual-circuit group 1 is operated, and the standby area backup power automatic switching of the dual-circuit group 2 is realized, as shown in fig. 8:
charging conditions are as follows: 1) the voltage of the double-circuit group 1 and the voltage of the double-circuit group 2 are both three-phase voltage; 2) when the double-circuit group 2 line voltage check control word is put in, the double-circuit group 2 line voltage satisfies the voltage condition (#2 line or #4 line voltage); or when the regional backup power automatic switch is put into use and the communication is normal, the pressure cut voltage of the opposite #2 line is pressed, and the opposite #2 line is in the closed position, or the pressure cut voltage of the opposite #4 line is pressed, and the opposite #4 line is in the closed position; 3) the switches of the double-circuit group 1 are in on-position, and the switches of the double-circuit group 2 are in off-position. And finishing charging after the charging time of the regional spare power automatic switching.
Discharge conditions: 1) when the double-loop group 2 line voltage check control word is switched on, the double-loop group 2 line voltage does not meet the voltage-holding condition, and when the regional backup power supply is switched on, the opposite side #2 line voltage is not met the voltage-holding condition or the opposite side 2DL is in the branch position, and the opposite side #4 line voltage is not met the voltage-holding condition or the opposite side 4DL is in the branch position, or the communication is abnormal, and the discharge is delayed by 15S.
2) The automatic switching device sends a switching-on command or switches 2DL and 4DL (non-maintenance) on any one;
3) when this device does not have the trip export: a hand-jump double-circuit group 1 switch (KKJ1 and KKJ3 both become 0); when the single-bus operation maintenance pressing plate is withdrawn, the bus-bar switch is manually tripped;
4) the locking spare power automatic switching is started; when a single-mother operation pressing plate is put in, the protection action of a mother I or a mother II is started; when the single-bus operation maintenance pressing plate is withdrawn: when the pressing plates of the circuits 1 and 3 positioned in the second bus exit, the protection action of the second bus is started; when the lines 1 and 3 are positioned in the second bus, the first bus protection action is started;
5) TWJ abnormality of any one of the double-circuit group 1 switch or the double-circuit group 2 switch;
6) the double-circuit group 1 switch or the bus-coupled switch rejects jumping;
7) withdrawing the area for spare power automatic switching;
8) and the #1 inlet wire overhaul and the #3 inlet wire overhaul pressing plate are all put into, or the #2 inlet wire overhaul and the #4 inlet wire overhaul pressing plate are all put into.
The action process is as follows:
after charging is completed, if a double-circuit line group 2 line voltage check control word is put in, the double-circuit line group 2 line voltage meets a pressure condition (#2 line or #4 line has pressure), or when a regional backup automatic switching is put in and communication is normal, the side #2 line pressure switch voltage has pressure and the side 2DL is in a closed position, or the side #4 line pressure switch voltage has pressure and the side 4DL is in a closed position, 1) the double-circuit line group 1 pressure switch voltage and the double-circuit line group 2 pressure switch voltage have no pressure (the line voltages are both smaller than a non-pressure starting fixed value), the double-circuit line group 1 has no current (I1 and I3), the double-circuit line group 1 is in a separated position or in a closed position and has no current, starting is carried out, and the double-circuit group 1 switches (1DL and 3DL) are jumped through time delay Tt1, and the double-circuit group 1 switch (1DL and 3 DL). And (4) confirming that the switch of the double-circuit line set 1 is tripped on, and the two groups of double-circuit line press-cutting voltages are both non-voltage (the line voltages are both smaller than a non-voltage switching-on fixed value), and closing the switch of the double-circuit line set 2 in a delayed mode through Th 1.
2) Under the condition that the single-bus operation pressing plate is withdrawn and the protection of the I bus and the II bus does not work, if the bus-coupled switch is tripped illegally and the voltage of the double-circuit group 2 is not pressurized (the line voltage is smaller than a non-pressurized starting fixed value), the double-circuit group is started, the bus-coupled switch is tripped through a time delay Tt1, if the circuit 1 and the circuit 3 are located at the II bus, the pressing plate is tripped, the II bus is tripped, and if the circuit 1 and the circuit 3 are located at the II bus, the pressing plate is tripped, the I bus is tripped. And (4) confirming that the bus-bar switch is tripped open and the voltage of the double-circuit group 2 is not voltage (the line voltages are all smaller than the non-voltage closing fixed value), and delaying the switch of the double-circuit group 2 through Th 1.
3) The single-bus operation pressing plate is withdrawn, I bus protection action is carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, or II bus protection actions are carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is thrown, the double-circuit line group 1 has no current, the voltage of the double-circuit line group 2 is not pressed (the line voltage is smaller than a non-pressed starting fixed value), the double-circuit line group is started, the bus-connected switch is tripped through time delay Tt1, II bus actions are tripped in a combined mode when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, and I bus actions are tripped in a combined mode when the pressing plate of the circuit. And (4) confirming that the bus-bar switch is tripped open and the voltage of the double-circuit group 2 is not voltage (the line voltages are all smaller than the non-voltage closing fixed value), and delaying the switch of the double-circuit group 2 through Th 1.
Example 3
The double loop set 1 is standby and the double loop set 2 is operational, see fig. 9:
charging conditions are as follows:
1) the voltage of the double-circuit group 1 and the voltage of the double-circuit group 2 are both three-phase voltage, when the voltage check control word of the double-circuit group 1 is put into use, the voltage of the double-circuit group 1 meets the voltage condition (#1 line or #3 line has voltage);
2) the switches of the double-circuit group 1 are all in split positions, and the switches of the double-circuit group 2 are in combined positions. And finishing charging after the spare power automatic switching charging time.
Discharge conditions:
1) when the voltage check control word of the double-circuit line group 1 is put into use, the voltage of the double-circuit line group 1 does not meet the voltage condition, and the discharge is delayed by 15S.
2) The automatic switching sends a switching-on command or any switch (non-maintenance) of the double-circuit line set 1 is switched on;
3) when this device does not have the trip export: a hand-jumping double-circuit group 2 switch; when the single-bus running pressing plate is withdrawn, the bus-bar switch is manually tripped;
4) the locking spare power automatic switching is started; when a single-mother operation pressing plate is put in, the protection action of a mother I or a mother II is started; when the single-mother operation pressing plate is withdrawn: when the pressing plates of the circuits 1 and 3 positioned in the second bus exit, the protection action of the first bus is started; when the lines 1 and 3 are positioned on the second bus pressing plate, the protection action of the second bus is started;
5) the switch of the double-circuit group 1 or the switch of the double-circuit group 2 is abnormal;
6) the double-circuit group 2 switch or the bus-coupled switch rejects jumping;
7) setting a control word or enabling a soft pressing plate to exit the area spare power automatic switching mode;
8) when the remote automatic casting is put into and the communication is normal, a 'opposite side blocking remote automatic casting' signal is received.
9) And the #1 inlet wire overhaul and the #3 inlet wire overhaul pressing plate are all put into, or the #2 inlet wire overhaul and the #4 inlet wire overhaul pressing plate are all put into.
The action process is as follows:
when the charging is completed, the dual loop group 1 line voltage check control word is put in and the dual loop group 1 line voltage satisfies the voltage condition (#1 line or #3 line voltage):
1) the voltage switching voltage of the double-circuit line set 1 and the voltage switching voltage of the double-circuit line set 2 are both non-voltage (the line voltages are both smaller than a non-voltage starting fixed value), when a remote backup power automatic switching device is switched in, a connection jump bus switch command sent from the opposite side is received, and then a connection jump I bus and a connection jump II bus act.
2) The voltage-cut voltage of the double-circuit group 1 and the voltage-cut voltage of the double-circuit group 2 are both non-voltage (the line voltages are both smaller than a non-voltage starting fixed value), the circuit of the double-circuit group 2 has no current, and the circuit is started when the voltage-cut voltage is at a branch position or a combination position and the circuit is non-voltage, and the double-circuit group 2 switches (2DL and 4DL) are jumped through a time delay Tt2 (when the remote spare power automatic switching is switched in, if a remote automatic switching signal is received from the opposite side within the time of Tt2, the remote spare power automatic switching does not jump). And (3) confirming that the double-circuit group 2 switch is tripped open (if a remote self-throwing signal for starting the opposite side is received, whether the double-circuit group 2 switch is tripped open is not judged), and delaying to close the double-circuit group 1 switch through Th2, wherein the two groups of double-circuit line pressure-cut voltages are both non-voltage (the line voltages are both smaller than a non-voltage closing fixed value).
3) Under the condition that the single-bus operation pressing plate is withdrawn and the protection of the I bus and the II bus does not work, if the bus-coupled switch is in a surreptitious mode and the voltage of the double-circuit group 1 is not pressurized (the line voltages are both smaller than a non-pressurized starting fixed value), the bus-coupled switch is started, the bus-coupled switch is jumped through a time delay Tt2, if the circuit 1 and the circuit 3 are located on the II bus pressing plate to be withdrawn, the I bus is jumped in a united mode, and if the circuit 1 and the circuit 3 are located on the II bus, the II bus is jumped in a united. And (4) confirming that the bus-bar switch is tripped open and the voltage of the voltage switching voltage of the double-circuit group 1 is not voltage (the line voltages are all smaller than a non-voltage switching-on fixed value), and delaying to switch on the double-circuit group 1 switch through Th 2.
4) The single-bus operation pressing plate is withdrawn, II bus protection actions are carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, or I bus protection actions are carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is thrown, 2 circuits of the double-circuit line group have no current, 1 voltage switching voltage of the double-circuit line group has no voltage (the line voltage is smaller than a non-voltage starting fixed value), the double-circuit line group is started, the bus connection switch is tripped through time delay Tt2, I bus actions are tripped in a combined mode when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, and II bus actions are tripped in a combined mode when the pressing plate of the. And (4) confirming that the bus-bar switch is tripped open and the voltage of the voltage switching voltage of the double-circuit group 1 is not voltage (the line voltages are all smaller than a non-voltage switching-on fixed value), and delaying to switch on the double-circuit group 1 switch through Th 2.
Example 4
The station is closed and the opposite station is opened, and the figure 10 shows that:
charging conditions are as follows: 1) the voltage of the double-circuit group 1 and the voltage of the double-circuit group 2 are both three-phase voltage; 2) the switch of the double-circuit group 1 is in the closed position, the switch of the double-circuit group 2 is in the closed position, and when the single-bus running pressing plate exits, the bus-coupled switch is in the closed position; when the single-bus running pressing plate is put in, the position of the bus coupler switch is not judged.
And finishing charging after the spare power automatic switching charging time.
Discharge conditions: 1) the switches of the double-circuit group 2 are all in separated positions; 2) when this device does not have the trip export: a hand-jumping double-circuit group 1 switch; when the single-bus running pressing plate is withdrawn, the bus-bar switch is manually tripped;
3) the locking spare power automatic switching is started or the remote spare power automatic switching is withdrawn; when a single-mother operation pressing plate is put in, the protection action of a mother I or a mother II is started; when the single-mother operation pressing plate is withdrawn: when the pressing plates of the circuits 1 and 3 positioned in the second bus exit, the protection action of the second bus is started; when the lines 1 and 3 are positioned in the second bus pressing plate, the first bus protection action is started;
4) the double-circuit group 1 is abnormal in switch;
5) the double-circuit group 1 switch or the bus-coupled switch rejects jumping;
6) setting a control word or enabling a soft pressing plate to exit from the automatic switching mode 6;
7) and the #1 inlet wire overhaul and the #3 inlet wire overhaul pressing plate are all put into, or the #2 inlet wire overhaul and the #4 inlet wire overhaul pressing plate are all put into.
The action process is as follows:
1) after charging is completed, the voltage-cut voltage of the double-circuit group 1 and the voltage-cut voltage of the double-circuit group 2 are both non-voltage (the line voltages are both smaller than a non-voltage starting fixed value), the double-circuit group 1 is free of current (I1 and I3 are both free of current), the double-circuit group 1 is in a separated position or in a combined position and the circuit is not voltage-free, starting is carried out, and the double-circuit group 1 switches (1DL and 3DL) are jumped through a time delay Tt6, and simultaneously the I bus and the II bus are jumped in a combined manner and send a combined jump command to an opposite. And after the switch of the double-circuit line group 1 is confirmed to be tripped, and the two groups of double-circuit lines have no voltage (the line voltage is smaller than the non-voltage switching-on fixed value), a remote self-throwing starting signal is sent to the opposite side.
2) Under the condition that the single-bus operation pressing plate is withdrawn and the protection of the I bus and the II bus does not act, if the bus-coupled switch is subjected to stealing tripping and the voltage of the double-circuit group 2 is not pressurized (the line voltage is smaller than a non-pressurized starting fixed value), the starting is carried out, the bus-coupled switch is tripped through a time delay Tt6, if the circuit 1 and the circuit 3 are positioned in the II bus, the pressing plate is withdrawn, the circuit II bus is tripped, if the circuit 1 and the circuit 3 are positioned in the II bus, the circuit I bus is tripped, and meanwhile, a bus tripping command is sent to the opposite station. And after the bus tie switch is determined to be tripped open and the voltage of the double-circuit group 2 is no voltage (the line voltage is less than the no-voltage switching-on fixed value), a remote self-throwing signal for starting the opposite side is sent.
3) The single-bus operation pressing plate is withdrawn, I bus protection action is carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, or II bus protection actions are carried out when the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is thrown, the double-circuit line group 1 has no current, the double-circuit line group 2 has no voltage (the line voltage is smaller than a non-voltage starting fixed value), the double-circuit line group is started, the bus-bus connection switch is tripped through time delay Tt6, II bus actions are in linkage tripping if the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is withdrawn, I bus actions are in linkage tripping if the pressing plate of the circuit 1 and the circuit 3 is positioned in II buses is thrown, and a linkage. And after the bus tie switch is determined to be tripped open and the voltage of the double-circuit group 2 is no voltage (the line voltage is less than the no-voltage switching-on fixed value), a remote self-throwing signal for starting the opposite side is sent.
Embodiments 2 to 4 illustrate that the high-voltage adaptive regional backup automatic switching system provided by the present invention can effectively perform logic operations on different wiring modes, and has adaptivity.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a regional automatic transfer system that prepares oneself of high pressure self-adaptation, includes transformer substation A, transformer substation B, regional automatic transfer device and power supply system owner wiring, its characterized in that:
the regional automatic bus transfer device comprises a regional automatic bus transfer logic judgment device and an acquisition execution unit;
the acquisition execution unit acquires analog quantity information such as voltage and current of a transformer substation and switching quantity information such as switch positions and the like, and simultaneously receives and executes a spare power automatic switching tripping and closing command issued by the regional spare power automatic switching logic judgment device;
the regional spare power automatic switching logic judgment device receives the acquisition information of the acquisition execution unit and performs logic judgment on a regional spare power automatic switching strategy;
the main wiring of the power supply system adopts a self-adaptive area spare power automatic switching model.
2. The system according to claim 1, wherein the adaptive area automatic backup power switching model has two power sources, a main power source and a backup power source.
3. The system according to claim 2, wherein the adaptive regional automatic backup power switching model adopts a double-bus connection mode, and each power supply or each line is connected to two groups of buses through a circuit breaker and two groups of isolating switches.
4. The system according to claim 3, wherein each breaker is provided with a service pressure plate.
5. The high-voltage self-adaptive regional automatic backup power switching system according to claim 1, wherein a substation is respectively provided with the regional automatic backup power switching devices, so that a conventional automatic backup power switching function in a station can be realized, and a function that two stations are mutually standby can also be realized.
6. The system according to claim 1, wherein the local automatic backup power switching device comprises an optical transmitting unit and an optical receiving unit, and the two local automatic backup power switching devices are directly connected through an optical fiber for information communication.
7. A spare power automatic switching control method of a high-voltage self-adaptive area spare power automatic switching system is characterized by comprising the following steps:
step 1: the regional automatic bus transfer logic judgment device acquires state information through an acquisition execution unit in a transformer substation;
step 2: completing the charging preparation;
and step 3: the regional automatic bus transfer logic judgment device is used for judging the voltage state, the line voltage and the line current state of the integral power supply of the transformer substation and the position state of each line switch in a comprehensive mode and starting the action logic of regional automatic bus transfer;
and 4, step 4: and the acquisition execution unit executes a command according to the action logic result of the regional automatic bus transfer logic judgment device.
8. The method for controlling the automatic backup power switching of the high voltage self-adaptive regional automatic backup power switching system according to claim 7, wherein the status information includes but is not limited to: and the voltage state, the line voltage, the line current state and the position state of each line switch of the whole power supply in the self-adaptive regional spare power automatic switching model.
9. The method for controlling the automatic backup power switching of the high-voltage self-adaptive regional automatic backup power switching system according to claim 7, wherein for a non-fully integrated substation, the action logic of the regional automatic backup power switching is in a charging completion state; if the discharging condition is not met, starting remote switching-on standby logic starting, and when a switching-on signal sent by a full switching-on station starting backup power automatic switching signal is received, executing a command by an acquisition execution unit and finishing the action logic of regional backup power automatic switching; judging whether the discharging condition is met or not again when the command of the closing signal is not received; and finishing the action logic of the regional backup power automatic switching when the discharging condition is met.
10. The method for controlling the automatic backup power switching of the high-voltage self-adaptive regional automatic backup power switching system according to claim 7, wherein for a fully-closed substation, the action logic of the regional automatic backup power switching is that the action logic of the regional automatic backup power switching is in a charging completion state; if the discharging condition is not met, starting a non-voltage tripping logic, locking the spare power automatic switching device, and sending a locking contact to a non-fully closed station; when the non-voltage tripping logic fails, tripping and starting the non-fully closed station spare power automatic switching; and if the discharging condition is met, ending the action logic of the regional backup power automatic switching.
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